US3762836A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Peristaltic pump construction
Assignee: 3M Co
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Filing: 1971-09-30
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Granted: 1973-10-02
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Expires: 1991-09-30
Abstract
Abstract A peristaltic pump assembly utilizing a housing with a circular inner wall and a rotor for progressively squeezing a tube lying against the wall, and the provision of a multiple capacity assembly which permits the use of optional walls selectively usable with corresponding rotors for each wall. A tube guide for clasping the ingress and egress ends of the tube is provided also to adapt to different size tubes which will be used with the optional wall units.
Inventors
- 👤 Vries J De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:48
CPC Classifications
F; F04; F04B; F04B43/00; F04B43/12; F04B43/1253
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
121 words
A peristaltic pump assembly comprising: a. a base plate having an opening for a power drive shaft, b. first means forming a circumferential wall on said base plate to serve as a pressure wall for a peristaltic pump rotor, c. a locator means on said base plate concentrically within said wall and outside said opening to serve as locator for a second pressure wall of smaller dimension than said first means, and d. a power shaft in said base plate opening shaped to support selectively a plurality of peristaltic pump rotors having respective dimensions to cooperate with said first and second pressure walls, whereby said pump may be operated with varying capacities depending on the installation of said second pressure wall.
Claim 2
Dependent Claim
121 words
A peristaltic pump assembly comprising: a. a base plate having an opening for a power drive shaft, b. first means forming a circumferential wall on said base plate to serve as a pressure wall for a peristaltic pump rotor, c. a locator means on said base plate concentrically within said wall and outside said opening to serve as locator for a second pressure wall of smaller dimension than said first means, and d. a power shaft in said base plate opening shaped to support selectively a plurality of peristaltic pump rotors having respective dimensions to cooperate with said first and second pressure walls, whereby said pump may be operated with varying capacities depending on the installation of said second pressure wall.
Claim 3
Dependent Claim
43 words
A peristaltic pump assembly as defined in claim 1 in which said base plate is circular in shape and said first means forming the circumferential wall extends around a portion of the base leaving the remainder of the base as a circular edge.
Claim 4
Dependent Claim
89 words
A peristaltic pump assembly as defined in claim 2 in which a tube holding bracket is associated with said base at the circular edge comprising a front plate to lie in a plane substantially parallel to the axis of said base plate having spaced tube openings extending from one edge thereof, slide means on said front plate to cooperate with said openings to contact a tube passing through said openings, and means to exert a resilient bias on said slide means to accommodate the openings to varying size tubes.
Claim 5
Dependent Claim
37 words
A peristaltic pump assembly as defined in claim 3 in which legs extend from each end of said front plate to said circular edge to mount said front plate in a position tangential to said circular edge.
Claim 6
Dependent Claim
46 words
A peristaltic pump assembly as defined in claim 3 in which said tube openings have a V-shape and said slides are provided with V-openings in a reverse direction to register with said first V-opening in a manner to provide adjustable openings to fit varying tube sizes.
Claim 7
Dependent Claim
54 words
A peristaltic pump assembly as defined in claim 1 in which rotary bearing means are provided in said base plate to support said power shaft, and a splash guard for protection of said bearings mounted to rotate with said shaft and positioned to overlie said bearings in a positioN closely adjacent said base plate.
Claim 8
Dependent Claim
54 words
A peristaltic pump assembly as defined in claim 6 in which said locator means on base plate comprises a raised plateau portion centrally thereof below said splash guard surrounding said power shaft opening and terminating in an annular shoulder, said shoulder serving to locate a selected small ring to serve as a pressure wall.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |